Malicious PDF — malware analysis report

Static analysis result for SHA-256 e60a4132d42639be…

MALICIOUS

PDF

91.7 KB Created: 2021-09-03 20:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 45d6abf51063ee4f648e00572127cd00 SHA-1: 199b0dc99380d7ef5a5c410066123ef4bce87777 SHA-256: e60a4132d42639be46f99171cd1945a0de34df5930047bdcf9b5ecd118f413f6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads, suggesting a phishing or redirection scheme. Although no executable scripts were extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609d143e22748---5043210408.pdf In PDF document text
    • http://vidaleve.ind.br/ckfinder/userfiles/files/gigolesofewufuwisuvone.pdfIn PDF document text
    • http://abwrosedale.com/uploads/files/85409335508.pdfIn PDF document text
    • http://vds-construct.pl/userfiles/file/26133414127.pdfIn PDF document text
    • https://betenrealestate.com/sites/default/files/file/loweso.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/5cee136d47dde285ce83bf8016d7b183/moreviwuwomelumuzupomuzib.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/quuog6eqnlbn7v2v3pksha4c14/sonotenekilipaxaz.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160781b0243d99---19204391529.pdfIn PDF document text
    • http://ana-jsc.com/upload/files/dakizofifisakuvafutowaxap.pdfIn PDF document text
    • http://greenmodels.ru/uploads/files/wakiva.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/4d9765ab5e90a8aad06a2b5cd19e276c/vosimoxi.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/2gnnilus2nvlg9ungqpsim648t/80320592157.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b884628c76a---kufuru.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/wegalonamomonofijozave.pdfIn PDF document text
    • http://jncs.kr/page_data/file/20210730174756.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/c761df32051dd6629f4362d6cca80c6c/47860775307.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/16229389965914.pdfIn PDF document text
    • https://delaneyllc.cfonewsletter.com/ckfinder/userfiles/files/rumuzofimiwusupujej.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/04b13b1e1ddbf27b705f5c067fa57aff/solizuja.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/0b21479079889ce7fd4931eb0c07f956/92892667241.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-6-30/20210630225311473231.pdfIn PDF document text
    • https://cdmsig.com/ckfinder/userfiles/files/76016895132.pdfIn PDF document text
    • https://barcelonamedicalcenter.com/files/galeria/files/pizajiki.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e947d8d90---bujokebabakekag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=mimi+kara+oboeru+n2+bunpou+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD010 26584 bytes
SHA-256: 0672f03d7f10443721a3e574c81875bd8331c1f479c54c2d2c96e3daf0f0372f
font_01_sfnt_off00011181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11181 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12998 10792 bytes
SHA-256: 66e5ba126d92e9e57acd723c2cd4287c1e801480504662546bfb075326933bdf
font_03_sfnt_off0001422c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1422C 16136 bytes
SHA-256: 9575130925f042cff98ec44e6ec39d068a2b1b9ea3eff92a92c35b526158a52e
font_04_sfnt_off000157ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157AC 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc